Mold.



L. J GARNET.

MOLD.

APPLICATION FILED AUG,24, 1907.

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L. J. GARNET.

M oLn. APPLICATION FILED AUG.24, 1907.

2 SHEETS-SHEET 2.

Patented Nov. 3,

LEIDY J. GARNET, F LANSDALE, PENNSYLVANIA.

MOLD'.

Specification of Letters Patent.

Patented Nov. 3, 1908.

Application led August 24, 1907. Serial No. 389,957.

To all whom it may concern:

Be it known that I, LnrDY J. GARNEL a citizen of the United States, residing at Lansdale, in the county of Montgomery and State of Pennsylvania, have invented certain new and useful Improvements in Molds, of which the following is a specification.

This invention is designed chiefly to provide a metal mold for metal castings, the purpose being to obviate the cost and loss of time attendant upon the use of sand molds in casting metal.

A further purpose of the invention is to devise a mold which will enable the output to be materially increased and to insure working of the casting, which is not possible by the ordinary sand mold.

The invention consists of a sectional mold of metal, having the gate-way at the lowest point and a vent and riser at the highest point and provided with a sprue which is contracted near the receiving end and provided at or near the contracted portion with a vent for the lescape of gases.

For a full understanding of the invention and the merits thereof and also to acquire a knowledge of the details of construction and the means for effecting the result, reference is to be had to the following description and accompanying drawings.

Vslhile the invention may be adapted to different forms and conditions by changes in the structure and minor details without defrom bottom to top, with the result that the" surplus metal may be easily removed.

The core 8 may be of any construction commonly resorted to in the formation of pipes, columns or the like, and is confined within the sections so as to leave a space corresponding to the shape o f the article to be cast. 'The entrance opening 9 is located at the lowest oint of the mold and constitutes the gate t rough which the molten metal finds its way into the mold during the casting operation. The sprue 10 is arranged between the two molds and is common thereto and gradually widens from a point near its upper end towards the bottom where it leads into the chamber 11 which is in communication with the openings or gates 9. T he sprue 1() flares at its receiving end, as indicated at 12, and is contracted at 13, ashort distance 'from the upper end and from the point 13 to the chamber 11 the sprue gradually iiares. A vent 14 leads outward from the sprue at or near the contracted end 13 and provides an CII escape for hot air and gases. A base 15 is provided to support the two molds, and the chamber 11 is formed in the upper portion thereof intermediate of its lon gltudinal edges. A core 16 is arranged in the bottom of the chamber 11 directly in line 95 with the sprue 10 and is formed of sand and receives the molten metal as it descends through the sprue 10 and deflects the same without producing chill. The bottom of the chamber 11 at each side of the core 16, is 'p supplied with a protector 17, the same conparting from the spirit or essential features thereof, still the preferred embodiment is shown in the accompanying drawings, in which:

Figure 1 is a transverse section of a mold embodying the invention, the same being taken on the line of Fig. 2. Fig. 2 is a central longitudinal section of a mold on the line @j-g/ of Fig. 1, the dotted lines near each end showing other gates. Fig. 3 is a top plan view of the mold, the dotted lines near each end showing other sprues.

Corresponding and like parts are referred to in the following description and indicated in all the views of the drawings by the same reference characters.

The mold illustrated is designed for casting pipe or hollow columns or pillars and comprises a pair of molds having a sprue and gate common to both and arranged between them. Each mold consists of four sections By having the sprue widening from the 1, 2, 3 and 4, which are snugly fitted together points 13 towards the chamber 11, the molten and adapted to be clamped or secured in any met-al has a free drop from the point 18 to the sistmg of a steel plate which receives and allows the molten metal to flow thereover without knitting. Gpposite ends of the chamber 11 are made rounding and lead into the opening or gates 9, thereby preventing formation of corners or angular spaces in which the metal would tend to lodge and accumulate.

chamber without touching sides of the sprue i and becoming chilled. By having the gate or opening 9 at the lowest point of the mold, the hot air and gases pass upward through the mold in advance-of the molten metal, thereby heating the walls of the mold in advance of the molten metal and preparing the mold so as to insure the formation of a per- Jfect casting. By having the vent and riser at the extreme top of the mold, all hot air and gases may readily escape and all dross and imperfect metal may pass off through the vent and thereby increase the chances for a perfect casting.

The number of sprues and gates vary according to the length of casting to be formed and the amount of metal required for the casting. The vent 5 extends the entire length of the mold space to provide an escape for the air so that a perfect casting may be obtained at each ouring.

Having thus described the invention, what is claimed as new is:

1. In combination, a mold, an approximately vertical sprue gradually increased in width from a point at or near the to towards the bottom, a chamber at the ower end of the sprue and in communication with the mold, a core of sand or like material let into the bottom of said chamber and arranged in vertical line with said sprue, and a plate of steel forming the bottom of said chamber at one side of the said core.

2. ln combination, companion molds, a sprue arranged between the molds and common to each and gradually increasing in width Jfrom a point at or near its top to its bottom, a chamber in communication with the said molds and having the sprue opening therein at a central point, a core of sand or like material arranged upon the bottom of the chamber in vertical line with the sprue, and protective lates of steel covering the bottom of the c amber at each side of the said core.

3. In combination, with a mold, a sprue having communication therewith and flared at its up er end and gradually widening from the ower end of the iared portion towards its lower end and having a vent at or near the contracted portion provided near its upper end.

In testimony whereof I ailix my signature in Presence of two witnesses.

LEIDY J. GARNET.

Vitnesses:

HARRY S. MILLER, CHARLEs H. MILLER.

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